21282898 has 32 divisors (see below), whose sum is σ = 39521664. Its totient is φ = 8370432.

The previous prime is 21282871. The next prime is 21282901. The reversal of 21282898 is 89828212.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 21282898.

It is an unprimeable number.

It is an upside-down number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61161 + ... + 61507.

It is an arithmetic number, because the mean of its divisors is an integer number (1235052).

Almost surely, 2^21282898 is an apocalyptic number.

21282898 is a deficient number, since it is larger than the sum of its proper divisors (18238766).

21282898 is a wasteful number, since it uses less digits than its factorization.

21282898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706.

The product of its digits is 36864, while the sum is 40.

The square root of 21282898 is about 4613.3391377613. The cubic root of 21282898 is about 277.1257753568.

The spelling of 21282898 in words is "twenty-one million, two hundred eighty-two thousand, eight hundred ninety-eight".